class AddColumnsCountMethodIn3tables < ActiveRecord::Migration
  def self.up
    add_column :tests, :formula, :string
    add_column :parts, :formula, :string
    add_column :dimens, :formula, :string
  end

  def self.down
    remove_column :tests, :formula
    remove_column :parts, :formula
    remove_column :dimens, :formula
  end
end
